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CVE-2023-39543

19
FAUCET Score

CVE-2023-39543 is a cross-site scripting (XSS) vulnerability affecting LuxCal Web Calendar versions prior to 5.2.3M (MySQL) and 5.2.3L (SQLite). This medium-severity flaw (CVSS 6.1) allows an unauthenticated remote attacker to execute arbitrary scripts in a user's browser through a low-complexity attack requiring user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.2.3mCPE matchmatch criteria
cpe:2.3:a:luxsoft:luxcal_web_calendar:*:*:*:*:*:*:*:*
< 5.2.3lCPE matchmatch criteria
cpe:2.3:a:luxsoft:luxcal_web_calendar:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.53%
Probability of exploitation in next 30 days
EPSS Percentile
41.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0053 is in the 44th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/jp/JVN04876736
Third Party Advisory
luxsoft.eu
Product
luxsoft.eu
Product